Bard P1248A2, P1148A2, P1236A1, P1242A1, P1224A1, P1136A2, P1230A1, P1130A2, P1124A2 User Manual

INSTALLATION INSTRUCTIONS

SINGLE PACKAGE

AIR CONDITIONERS

MODELS

P1124A2 P1224A1

P1130A2 P1230A1

P1136A2 P1236A1

P1142A3 P1242A1

P1148A2 P1248A2

P1060A1

	Bard Manufacturing Company	Manual :	2100-353C
	Bryan, Ohio 43506	Supersedes:	2100-353B
	Since 1914 . . . Moving ahead just as planned	File:	Volume II Tab 10
		Date:	01-09-03

© Copyright 2003

CONTENTS

Getting Other Informations and Publications
General Instructions
Important ................................................................	2
Shipping Damage ....................................................	2
General ................................................................	2
Field Installed Heater Packages (Optional) .............	2
Installation
Location ................................................................	9
Typical Installations .................................................	9
Condensate Drain Trap .........................................	14
Air Filters ..............................................................	14
Wiring – Main Power .............................................	15
Wiring – 24V Low Voltage Control Circuit .............	15
Transformer Taps ...................................................	15
Thermostats ...........................................................	15

Figures
Figure 1	Unit Dimensions ......................................	8
Figure 2	Slab Mounting at Ground Level ............	10
Figure 3	Airflow and Service Access
	Clearances ............................................	10
Figure 4	Roof Top Application ..............................	11
Figure 5	Elevated Mounting Platforms .................	11
Figure 6	Prefabricated Rood Curb
	Specifications ........................................	12
Figure 7	Field Fabricated Curbing .......................	13
Figure 8	Condensate Drain Trap .........................	14
Figure 9	Low Voltage Wiring ...............................	16
Figure 10 Fan Blade Setting .................................		19
Figure 11	Brazing Diagram ...................................	20

Start Up and Operation
Three Phase Scroll Compressor Start Up
Information .............................................................	17
Sequence of Operation ..........................................	17
Start Up Notes .......................................................	17
Indoor Blower Motor ..............................................	17
Compressor Control Module ..................................	17
Adjustments ...........................................................	18
Service and Troubleshooting
Service Hints .........................................................	19
Pressure Service Ports ..........................................	19
Refrigerant Charge ................................................	19
Fan Blade Settings ................................................	19
Suction and Discharge Tube Brazing ....................	20
Pressure Table .......................................................	14
Wiring Diagrams ...............................................	15-16
Troubleshooting ECM Blower Motors .............	23-24

Tables
Table	1	Rated CFM & ESP ..................................	2
Table	2	Electrical Specifications ..........................	3
Table	2A	Electrical Specifications ..........................	4
Table	2B	Electrical Spedifications ..........................	5
Table	3	Option Field Installed Heater Packages . 6
Table	4	Electric Heater Table ...............................	8
Table	5	Unit Dimensions ......................................	5
Table	6	Roof Curb Details .................................	13
Table	7	Dimension for Figure 7 ..........................	13
Table	8	Filter Requirements & Sizes .................	14
Table	9	Thermostat Wire Size ...........................	15
Table	10	Wall Thermostat and Subbase
		Combinations ........................................	15
Table	11	Suction Line Temperatures ...................	19
Table	12	Fan Blade Setting Dimensions ..............	19
Table	13	Indoor Blower Performance ..................	20
Table	14	Pressure Table ......................................	21
Table	14A Pressure Table ......................................		22

Getting Other Information and Publications

These publications can help you install the air conditioner or heat pump. You can usually find these at your local library or purchase them directly from the publisher. Be sure to consult current edition of each standard.

National Electrical Code ......................	ANSI/NFPA 70
Standard for the Installation ..............	ANSI/NFPA 90A
of Air Conditioning and
Ventilating Systems
Standard for Warm Air ......................	ANSI/NFPA 90B
Heating and Air
Conditioning Systems
Load Calculation for ............................	ACCA Manual J
Residential Winter and
Summer Air Conditioning
Duct Design for Residential ..............	ACCA Manual D

Winter and Summer Air

Conditioning and Equipment Selection

FOR MORE INFORMATION, CONTACT THESE PUBLISHERS:

ACCA	Air Conditioning Contractors of America
	1712 New Hampshire Ave. N.W.
	Washington, DC 20009
	Telephone: [phone]
	Fax: [phone]

ANSI	American National Standards Institute
	11 West Street, 13th Floor
	New York, NY 10036
	Telephone: [phone]
	Fax: [phone]

ASHRAE American Society of Heating, Refrigerating,

and Air Conditioning Engineers, Inc.

1791 Tullie Circle, N.E.

Atlanta, GA 30329-2305

Telephone: [phone]

Fax: [phone]

NFPA	National Fire Protection Association
	Batterymarch Park
	P.O. Box 9101
	Quincy, MA 02269-9901
	Telephone: [phone]
	Fax: [phone]

Manual 2100-353

Page 1

GENERAL INSTRUCTIONS

IMPORTANT

The equipment covered in this manual is to be installed by trained, experienced service and installation technicians. All duct work, supply and return ducts, must be properly sized for the design air flow requirement of the equipment. ACCA is an excellent guide to proper sizing. All duct work or portions thereof not in the conditioned space should be properly insulated in order to both conserve energy and prevent condensation or moisture damage.

SHIPPING DAMAGE

Upon receipt of equipment, the carton should be checked for external signs of shipping damage. If damage is found, the receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent.

FIELD INSTALLED HEATER PACKAGES (OPTIONAL)

These packaged air conditions are manufactured without supplementary electric heaters. Supplementary heaters are available for simple, fast field installation.

A separate power circuit is required for the supplementary heaters.

IMPORTANT: Refer to Table 1 when designing duct work for maximum available static pressure with heater installed.

Refer to data shown in Table 3 and 4 for proper application information on all available heater combinations and what units they can be used with. It also shows the applicable circuit ampacities, fuse size, and wire size for each heater combination.

GENERAL

The refrigerant system is completely assembled and charged. All internal wiring is complete.

The unit is designed for use with or without duct work. Flanges are provided for attaching the supply and return ducts.

These instructions explain the recommended method to install the air cooled self-contained unit and the electrical wiring connections to the unit.

These instructions and any instructions packaged with any separate equipment required to make up the entire heat pump system should be carefully read before beginning the installation. Note particularly “Starting Procedure” and any tags and/or labels attached to the equipment.

While these instructions are intended as a general recommended guide, they do not supersede any national and/or local codes in any way. Authorities having jurisdiction should be consulted before the installation is made.

TABLE 1

RATED CFM AND EXTERNAL STATIC PRESSURE (ESP)

Model	Rated	Recommended		Rated	Max.
No.	CFM	Airflow Range		ESP	ESP
P1124A2	800	720	- 880	0.20	0.50
P1224A1	800	Note 1		0.10	0.50
P1130A2	1125	1020	- 1275	0.20	0.50
P1230A1	1000	Note 1		0.15	0.50
P1136A2	1250	1150	- 1400	0.30	0.50
P1236A1	1100	Note 1		0.15	0.50
P1142A3	1400	1260 - 1540		0.20	0.40
P1242A1	1400	Note 1		0.20	0.50
P1148A2	1550	1400	- 1700	0.40	0.50
P1248A2	1550	Note 1		0.20	0.50
P1060A1	1700	1530	- 1870	0.20	0.50

NOTE: ECM motors provide rated CFM up to 0.50 ESP

Manual 2100-353

Page 2

TABLE 2

ELECTRICAL SPECIFICATIONS

	Model	P1124A2	P1130A2	P1136A2	P1136A1-B	P1136A1-C	P1142A3
	Electric Rating –	230/208-60-1	230/208-60-1	230/208-60-1	230/208-60-3	460-60-3	230/208-60-1
	60 Hz – Circuit A
	Operating Voltage Range	197 - 253	197 - 253	197 - 253	187 - 253	414 - 506	197 - 253
	Minimum Circuit Ampacity	17	21	25	18	12	29
	BCSC	10.3	13.6	16	11	6	18.5
	Field Wire Size *	12	10	8	10	14	8
	Ground Wire Size	12	10	10	10	14	10
	Delay Fuse – Max. **	25	30	40	25	15	45
	Tota unit Amps – 230/208	11.7/12.3	15.4/16.9	17.1/18.7	12.3/12.9	7.3	23.1/24.2
	Compressor – Circuit A
	Compressor Type	Scroll	Scroll	Scroll	Scroll	Scroll	Scroll
	Volts	230/208	230/208	230/208	230/208	460	230/208
	Rated Load Amps	8.4/9.0	12.1/13.6	13.8/15.4	9.0/9.6	4.9	17.0/18.5
	Lock Roter Amps	56/56	72.5/72.5	88/88	77/77	39	104/104
	Fan Motor and Condenser
	Fan Motor – HP/RPM	1/5 - 1090	1/5 - 1075	1/5 - 1075	1/5 - 1075	1/5 - 1075	1/2 - 1075
	Fan Motor Amps	1.2	1.6	1.6	1.6	1.0	2.5
	Fan – Dia./CFM	20"/1942	20"/2400	20"/2100	20"/2000	20"/2000	24"/2850
	Motor and Evaporator
	Blower Motor – HP/RPM	1/3 - 1075	1/5 - 1075	1/5 - 1075	1/5 - 1075	1/5 - 1075	1/2 - 1075
	Blower Motor – Amps	2.1	2.6	2.6	2.6	1.4	3.2
	CFM Cooling & ESP	800 @ 0.20	1125 @ 0.20	1250 @ 0.30	1275 @ 0.30	1275 @ 0.30	1400 @ 0.20
	Charge (R22 oz.)	54	64	93	93	93	89
	Shipping Weight (pounds)	300	310	330	330	330	390

Manual 2100-353

Page 3

TABLE 2A

ELECTRICAL SPECIFICATIONS

	Model	P1148A2	P1148A2-B	P1148A2-C	P1060A1	P1060A1-B	P1060A1-C
	Electric Rating –	230/208-60-1	230/208-60-3	460-60-3	230/208-60-1	460-60-3	460-60-3
	60 Hz – Circuit A
	Operating Voltage Range	197 - 253	187 - 253	414 - 506	197 - 253	187 - 253	414 - 506
	Minimum Circuit Ampacity	32	24	12	42	28	14
	BCSC	20.5	14.7	7	29	12	9
	Field Wire Size *	8	10	12	8	8	12
	Ground Wire Size	10	10	12	10	10	12
	Delay Fuse – Max. **	50	35	15	60	45	20
	Tota unit Amps – 230/208	24.2/26.2	17.9/19.1	8.8	30.9/33.7	21.7/23.7	11.2
	Compressor – Circuit A
	Compressor Type	Scroll	Scroll	Scroll	Scroll	Scroll	Scroll
	Volts	230/208	230/208	460	230/208	230/208	460
	Rated Load Amps	18.5/20.5	12.2/13.4	6	25.2/28.2	16/18	8.4
	Lock Roter Amps	137/137	91/91	50	169/169	123/123	62
	Fan Motor and Condenser
	Fan Motor – HP/RPM	1/3 - 850	1/3 - 850	1/3 - 850	1/3 - 850	1/3 - 850	1/3 - 850
	Fan Motor Amps	2.5	2.5	1.2	2.5	2.5	1.2
	Fan – Dia./CFM	24"/3100	24"/3100	24"/3100	24"/3100	24"/3100	24"/3100
	Motor and Evaporator
	Blower Motor – HP/RPM	1/2 - 1075	1/2 - 1075	1/2 - 1075	1/2 - 1075	1/2 - 1075	1/2 - 1075
	Blower Motor – Amps	3.2	3.2	1.6	3.2	3.2	1.6
	CFM Cooling & ESP	1550 @ 0.40	1550 @ 0.40	1550 @ 0.40	1700 @ 0.20	1700 @ 0.20	1700 @ 0.20
	Charge (R22 oz.)				120	120	120
	Shipping Weight (pounds)	430	430	430	425	425	425

Manual 2100-353

Page 4

TABLE 2B

ELECTRICAL SPECIFICATIONS

	Model	P1224A1	P1230A1	P1236A1	P1236A1-B	P1242A1	P1248A2	P1248A2-B
	Electric Rating –	230/208-60-1	230/208-60-1	230/208-60-1	230/208-60-3	230/208-60-1	230/208-60-1	230/208-60-3
	60 Hz – Circuit A
	Operating Voltage Range	197 - 253	197 - 253	197 - 253	187 - 253	197 - 253	197 - 253	187 - 253
	Minimum Circuit Ampacity	17	21	25	19	30	34	23
	BCSC	10.3	13.5	16.2	10.9	18	21	12.8
	Field Wire Size *	12	10	8	10	8	6	8
	Ground Wire Size	12	10	10	10	10	10	10
	Delay Fuse – Max. **	25	30	40	25	45	50	35
	Tota unit Amps – 230/208	11.8/12.4	15.7/17.1	19.2/21.1	14.9/15.8	23.2/24.1	25.5/27	19.4/19.7
	Compressor – Circuit A
	Compressor Type	Scroll	Scroll	Scroll	Scroll	Scroll	Scroll	Scroll
	Volts	230/208	230/208	230/208	230/208	230/208	230/208	230/208
	Rated Load Amps	8.4/9.0	11.4/12.8	14.3/16.2	10/10.9	16.4/17.3	18.5/20	12.4/12.7
	Lock Roter Amps	56/56	76/76	90.5/90.5	77/77	104/104	137/137	91/91
	Fan Motor and Condenser
	Fan Motor – HP/RPM	1/5 - 1090	1/5 - 1075	1/5 - 1075	1/5 - 1075	1/3 - 825	1/3 - 825	1/3 - 825
	Fan Motor Amps	1.2	1.6	1.6	1.6	2.5	2.5	2.5
	Fan – Dia./CFM	20"/1975	20"/2400	20"/2100	20"/2100	24"/2900	24"/2350	24"/2350
	Motor and Evaporator
	Blower Motor – HP/RPM	1/3 Variable	1/2 Variable	1/2 Variable	1/2 Variable	1/2 Variable	1/2 Variable	1/2 Variable
	Blower Motor – Amps	2.2	2.7	3.3	3.3	4.3	4.5	4.5
	CFM Cooling & ESP	800 @ 0.10	1000 @ 0.15	1100 @ 0.15	1100 @ 0.15	1400 @ 0.20	1550 @ 0.20	1550 @ 0.20
	Charge (R22 oz.)	53	88	102	102	118	151	151
	Shipping Weight (pounds)	300	330	340	340	410	430	430

Manual 2100-353

Page 5

Page	Manual
6	353-2100

TABLE 3

OPTIONAL FIELD INSTALLED HEATER PACKAGES

ONLY TO BE USED WITH THE MODELS INDICATED

Heater Package

Volts &

Model

Phase

P1124A2

P1124A1

P1130A2

P1230A1

P1236A2

P1136A1-C

P1136A1-C

P1236A1

P1236A1-B

EH3PB-A05

240/208-1

S

NA

S

NA

S

A

A

NA

NA

EH3PB-A08

240/208-1

S

NA

S

NA

S

A

A

NA

NA

EH3PB-A10

240/208-1

S

NA

S

S

S

A

A

S

NA

EH3PB-A15

240/208-1

NA

NA

S

NA

S

A

A

NA

NA

EH3PC-A05

240/208-1

NA

S

NA

S

NA

NA

NA

S

NA

This column

is left blank

EH3PC-A10

240/208-1

NA

S

NA

NA

NA

NA

NA

NA

NA

intentionally.

EH3PC-A15

240/208-1

NA

NA

NA

S

NA

NA

NA

S

NA

EH3PB-B09

240/208-3

A

NA

A

NA

A

S

A

NA

S

EH3PB-B15

240/208-3

NA

NA

A

NA

A

S

A

NA

S

EHPB-C09

480-3

NA

NA

A

NA

A

A

S

NA

NA

EHPB-C15

480-3

NA

NA

A

NA

A

A

S

NA

NA

Heater Package

Volts &

Model

Phase

P1142A3

P1242A1

P1148A2

P1148A2-B

P1148A2-C

P1248A2

P1248A2-B

P1060A1

P1060A1-B

P1060A1-C

EH5PB-A05

240/208-1

S

S

S

A

A

S

A

S

A

A

EH5PB-A10

240/208-1

S

S

S

A

A

S

A

S

A

A

EH5PB-A15

240/208-1

S

S

S

A

A

S

A

S

A

A

EH5PB-A20

240/208-1

S

NA

S

A

A

NA

NA

S

A

A

EH5PB-B09

240/208-3

A

A

A

S

A

A

S

A

S

A

EH5PB-B15

240/208-3

A

A

A

S

A

A

S

A

S

A

EH5PB-B18

240/208-3

A

NA

A

S

A

NA

NA

A

S

A

EH5PC-C09

480-3

A

NA

A

A

S

NA

NA

A

A

S

EH5PC-C15

480-3

A

NA

A

A

S

NA

NA

A

A

S

EH5PC-C18

480-3

A

NA

A

A

S

NA

NA

A

A

S

S = Standard Application

– Heater volts and phase same as basic unit A =

Alternate Application

– Heater volts and phase different from basic unit.

N = Not Approved

Page	Manual
7	353-2100

TABLE 4

OPTIONAL FIELD INSTALLED ELECTRIC HEATER TABLE

		Htr. KW &		Htr. KW &						Circuit B
		Capacity		Capacity						1	2	3
		@ 240 Volts		@ 208 Volts			Heater		Min.	Max. Over	Field	Ground
Heater Pkg.	Unit Volts					240/208V	Internal	No. Field	Circuit	Current	Power	Wire
Model No.	Phases	KW	BTUH	KW	BTUH	Htr. Amps	Fuses	Circuits	Ampacity	Protection	Wiring	Size
EH3PB-A05	240/208-1	5	17,100	3.75	12,800	20.8/18.1		1	26/23	30/25	10/10	10
EH3PB-A08	240/208-1	8	27,300	6.00	20,500	33.3/28.8		1	42/36	45/40	10/10	10
EH3PB-A10	240/208-1	10	34,100	7.50	26,000	41.6/36.2		1	53/46	60/50	6/8	10
EH3PB-A15	240/208-1	15	51,200	11.25	38,400	62.5/54.1	30/60	1	79/68	80/70	4/4	8
EH3PC-A08	240/208-1	5	17,100	3.75	12,800	20.8/18.1		1	26/23	30/25	10/10	10
EH3PC-A10	240/208-1	10	34,100	7.50	26,000	41.6/36.2		1	53/46	60/50	6/8	10
EH3PC-A15	240/208-1	15	51,200	11.25	38,400	62.5/54.1	30/60	1	79/68	80/70	4/4	8
EH5PB-A05	240/208-1	5	17,100	3.75	12,800	20.8/18.1		1	26/23	30/25	10/10	10
EH5PB-A10	240/208-1	10	34,100	7.50	26,000	41.6/36.2		1	53/46	60/50	6/8	10
EH5PB-A15	240/208-1	15	51,200	11.25	38,400	62.5/54.1	30/60	1	79/68	80/70	4/4	8
EH5PB-A20	240/208-1	20	68,200	15.00	51,200	83.2/72.1	60/60	1	104/91	110/100	2/3	6
EH3PB-B09	240/208-3	9	30,700	6.75	23,000	21.7/18.7		1	28/24	30/25	10/10	10
EH3PB-B15	240/208-3	15	51,200	11.25	38,400	36.2/31.2		1	46/39	50/40	8/8	10
EH5PB-B09	240/208-3	9	30,700	6.75	23,000	21.7/18.7		1	28/24	30/25	10/10	10
EH5PB-B15	240/208-3	15	51,200	11.25	38,400	36.2/31.2		1	46/39	50/40	8/8	10
EH5PB-B18	240/208-3	18	61,400	13.50	46,100	43.4/37.5		1	55/47	60/50	6/8	10
EH3PB-C09	480-3	9	30,700	8.26	28,200	10.8		1	15	15	14	14
EH3PB-C15	480-3	15	51,200	13.77	47,000	18.0		1	23	25	10	10
EH5PB-C09	480-3	9	30,700	8.26	28,200	10.8		1	15	15	14	14
EH5PB-C15	480-3	15	51,200	13.77	47,000	18.0		1	23	25	10	10
EH5PB-C18	480-3	18	61,400	16.53	56,400	21.7		1	28	30	10	10

jTime Delay fuses of “HACR” type circuit breakers must be used for 60 and smaller sizes. Standard fuses or circuit breakers are suitable for sizes 70 and larger. 480V circuit breakers are not “HACR” type.

k Based on wire suitable for 75 degree C. Other wiring materials must be rated for marked “Minimum Circuit Ampacity” or greater. l Based upon Table 250-95 of N.E.C. 1993. See electric data for basic heat pump for Circuit A wiring specification requirements.

IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses and conductor wires in accordance with the National Electrical Code and all existing local codes.

FIGURE 1

DIMENSIONS OF UNITS

MIS-1305

TABLE 5

DIMENSIONS OF UNITS

Duct Opening (Inches)

Model

Nominal Cabinet Dimensions (Inches)

Discharge

Return Air

No.

A

B

C

J

K

L

M

D

E

F

G

H

P1124A2

P1224A1

P1130A2

24-1/4

48-3/16

38-1/8

26-1/8

2-1/8

9/16

9/16

33

6

33

14

7/8

P1230A1

P1136A2

P1236A1

P1142A3

P1242A1

31-1/4

50

42

26

3

2-3/4

7-9/16

38

10

38

16

1-3/8

P1148A2

P1248A2

P1060A1

Manual 2100-353

Page 8

INSTALLATION

LOCATION

GENERAL

The unit must be located outside, or in a well ventilated area. It must not be in the space being heated or cooled. A sound absorbing material should be considered if the unit is to be installed in such a position or location that might cause transmission of sound or vibration to the living area or adjacent buildings.

SLAB MOUNTING

In areas where winter temperatures DO NOT go below 32° F for periods over twelve hours, the unit may be slab mounted at grade level. When installing unit at grade level, install on a concrete slab at least four inches above finished grade level. Slab should have a slope tolerance away from the building structure of at lease 1/4 inch per foot, while being level from side to side. Place slab in a location where runoff water from higher ground will not collect around unit. See Figure 2.

A minimum of 18 inches should be provided between the coil inlet and any building surfaces. Provide at least four feet between coil outlet and any building wall, fences or other vertical structures. Provide a minimum of three feet clearance on the service access side of the unit. See Figure 3.

ROOF MOUNTING

When a unit is installed in areas where low ambient temperatures or strong winter winds exist, it should be placed for prevailing winter winds are not in direct line with the outdoor coil. If this is not possible, a wind barrier should be constructed. Place barrier 24 inches from the coil inlet side of the unit and in the direction of prevailing winds. Size barrier at least the same height and width as the unit. This may be necessary on ground level installations, also. See Figure 4.

WINTER INSTALLATION BELOW 32°F

In areas where winter conditions go below 32°F for extended periods, the unit must be elevated above the mounting surface to prevent snowfall or ice accumulation from interfering with the operation of the unit. A minimum of twelve inch elevation is recommended, while greater elevation may be required for areas of high snow accumulation. Poured concrete, steel framework, brick, cement block, etc., can be utilized to construct a suitable raised mounting platform. See Figure 5.

TYPICAL INSTALLATIONS

1.ROOF MOUNTED – The unit is mounted on a sturdy base on the roof of the building. Return air to the unit is brought through a single return grille (grilles with built-in filters are best since they enable easy access for filter changing). Return air ducts are attached to the lower section of the front panel. Supply air is brought from the unit to attic duct work or to a furred down hall. Supply air duct is attached to the top of the front panel.

CAUTION: All outdoor duct work must be thoroughly insulated and weatherproofed. All attic duct work must be thoroughly insulated. Two inch thick insulation with suitable vapor barrier is recommended for both outdoor and attic runs.

In roof top installation, as in all installations, the air conditioner must be level from side to side. However, the unit should have a pitch along the length to assure complete external drainage of precipitation and of defrost condensate. See Figures 6 and 7, and Tables 6 and 7.

2.CRAWL SPACE – Duct work installed in crawl space must be well insulated and provided with a vapor barrier. In addition, the crawl space must be thoroughly ventilated and provided with a good vapor barrier as a ground cover. It is most desirable to install the unit will be outdoors rather than inside the crawl space, so that it will be readily accessible for service.

3.SLAB MOUNTED AT GROUND LEVEL – This type installation is ideal for homes with a slab floor construction where a roof mounted unit is not desired. The supply and return duct work can be run through a furred closet space.

4.THROUGH THE WALL – This type installation requires a suitable framework to be fabricated capable of withstanding the unit weight. Normally the unit will be insulated so as to minimize supply and return duct work.

Manual 2100-353

Page 9

FIGURE 2

SLAB MOUNTING AT GROUND LEVEL (Above 32°F Outside Temperature)

MIS-1184

FIGURE 3

AIRFLOW AND SERVICE ACCESS CLEARANCES

MIS-1185

Manual 2100-353

Page 10

FIGURE 4

ROOF TOP APPLICATION

(May also be required for ground level installations)

MIS-1176

FIGURE 5

ELEVATED MOUNTING PLATFORMS

MIS-1183
Manual	2100-353
Page	11

Page	Manual
12	353-2100

FIGURE 6

PREFABRICATED ROOF CURB SPECIFICATIONS

HEAVY GAUGE GALVANIZED WITH WOOD NAILING STRIP, WELDED/LEAKPROOF

ONCE PIECE CONSTRUCTION – READY TO INSTALL

MIS-1177C

TABLE 6

ROOF CURB DETAILS (Refer to Figure 7)

		Roof	Roof					Roof Curb Details
		Hood	Curb
	Unit Model			A	B	C	D	E	F	G	H	I	J	K	L
		Model	Model
	P1124A3
	P1224A2
	P1130A2	RHE-36	9042-003	80.375	40.25	37.25	38.375	35.375	42	24.25	19.125	48.188	14.75	38.125	38.25
	P1230A1
	P1136A2
	P1236A1
	P1142A3
	P1242A1
	P1148A2	RHE-60	9042-004	82.375	44.125	41.125	38.375	35.375	44	31.25	19.125	50	14.75	42	38.25
	P1248A2
	P1060A1

FIGURE 7

FIELD FABRICATED CURBING

j A SEPARATE METAL FLASHING SHOULD BE

INSTALLED AROUND WOOD CURBING. CAULK AND SEAL ALL JOINTS AND WEATHERPROOF.

MIS-1178A

TABLE 7

DIMENSION FOR X IN FIG. 7

Unit Model	Roof Hood	Dimension
	Model	X
P1124A2
P1224A1
P1130A2	RHE-36	41
P1230A1
P1136A2
P1236A1
P1142A3
P1242A1	RHE60	44-7/8
P1148A2
P1248A2
P1060A1
		Manual	2100-353
		Page	13

5.OTHER INSTALLATIONS – Many other installations are possible with the packaged air conditioner. No matter what the installation, always consider the following facts:

A.Insure that the discharge air is not obstructed in any way so as to cause operation difficulties.

B.The indoor coil drain pan is equipped with a coupling that must be piped through a condensate drain trap to a suitable drain.

C.Always mount the unit is such a position that it may be easily reached for servicing and maintenance.

D.Insure that the unit is clear so that proper air flow over the outdoor coil will be maintained.

If this unit is operated in cooling below a 65° outdoor ambient temperature, the installation of low ambient controls (CMA-6) to unit is required.

CONDENSATE DRAIN TRAP

It is very important to provide a trap in the condensate drain line to allow a positive liquid seal in the line and assure correct drainage from the coil condensate pan.

Install condensate drain trap shown in Figure 8. Use drain connection size or larger. Do not operate unit without trap. Unit must be level or slightly inclined toward drain. With a trap installed on a unit located in an unconditioned area, water in the trap may freeze. It is recommended that the trap material be of a type that will allow for expansion of water when it freezes.

AIR FILTERS

Air filters for the return air side of the system are not provided as part of these models, and must be field supplied and installed as part of the final installation.

Prior thought should be given to return air location and placement of the air filter(s). The air filter(s) must be of adequate size and readily accessible to the operator of the equipment. Filters must be adequate in size and properly maintained for proper operation. If this is not done, excessive energy use, poor performance, and multiple service problems will result. It is impossible to oversize air filters. Generous sizing will result in cleaner air and coils as well as lower operating costs and extend the time between required changes. Table 8 shows minimum filter areas and recommended filter sizes. Actual filter sizes can vary with the installation due to single or multiple returns utilizing a filter/grille arrangement or being placed immediately ahead of the indoor coil face in the return air duct.

TABLE 8

FILTER REQUIREMENTS & SIZES

	Model No.	Minimum Filter Area	Recommended
			Size
	P1124A2
	P1224A1	462 Square Inches
	P1130A2		15x30-5/8x1
	P1230A1	(3.21 Square Feet)
	P1136A2
	P1236A1
	P1142A3
	P1242A1	608 Square Inches	(2) 16x20x1
	P1148A2
		(4.62 Square Feet)
	P1248A2
	P1060A1

NOTE: If roof hood accessory is to be used, information on air filters may be found under that heading in this manual. Air filters are supplied as part of that package.

FIGURE 8

CONDENSATE DRAIN TRAP

MIS-136

Manual 2100-353

Page 14

WIRING – MAIN POWER

Refer to the unit rating plate for wire sizing information and maximum fuse size. Each outdoor unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring used must be sized to carry that amount of current. If field installed heaters are added to the basic unit, a second separate power supply circuit will be required. The heater rating plate located adjacent to the basic unit rating plate will show the appropriate circuit ampacity fuse size, etc. (Also see “Electrical Specifications” on pages 3, 4 and 5.) All models are suitable for connection with copper wire only. These instructions must be adhered to. Refer to the National Electrical Code for complete current carrying capacity data on the various insulation grades of wiring material.

The electrical specifications list fuse and wire sizes (75°F copper) for all models including the most commonly used heater sizes.

The unit rating plate lists a “Maximum Time Delay Fuse” or “HACR” type circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor.

WIRING – 24V LOW VOLTAGE CONTROL CIRCUIT

Five (5) wires should be run from thermostat subbase to the 24V terminal board in the unit. A five conductor, 18 gauge copper, color-coded thermostat cable is recommended. The connection points are shown in Figure 9.

TABLE 9

THERMOSTAT WIRE SIZE

			Maximum
			Distance
Transformer VA	FLA	Wire Gauge	In Feet
		20	45
		18	60
55	2.3	16	100
		14	160
		12	250

TRANSFORMER TAPS

230/208V, 1 phase and 3 phase equipment employ dual primary voltage transformers. All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240 and 208V taps are:

TAP	RANGE
240	253 – 216
208	220 – 187

NOTE: The voltage should be measured at the field power connection point in the unit and while the unit is operating at full load (maximum amperage operating condition).

THERMOSTATS

See specific wiring information for the different models, heater KWs, and voltages on unit and heating wiring diagrams..

TABLE 10

WALL THERMOSTAT AND SUBBASE COMBINATIONS

	Thermostat	Subbase		Predominant Features
	8403-022	8403-003	1 stage heat, 1 stage cool,		Mercury
	T87F3111	Q539A1220	System: Heat-off-cool		Fan: on-auto
	8403-041	——	1 stage heat, 1 stage cool,		Mercury
	T8034C1499		System: Heat-off-cool		Fan: on-auto
	8403-049	——	2 stage heat, 2 stage cool,
	1F93-380		Electronic	Programmable
	8403-043	——	1 stage heat, 1 stage cool,		Mercury
	CM200		System: Heat-off-cool		Fan: on-auto Snap Action
	8403-048		1 stage heat, 1 stage cool,		Mercury
		——	System: Heat-off-cool		Fan: on-auto
	T8400C1313
			Electronic	Non-Programmable
	8403-019	8404-012	1 stage heat, 1 stage cool,		Mercury
	T874C1760	Q674C1760	System: Heat-auto-cool		Fan: on-auto

IMPORTANT NOTE: Only the thermostat and subbase combinations as shown above will work with this equipment. The thermostat and subbase MUST be matched, and correct operation can be assured only by proper selection and application of these parts.

Manual 2100-353

Page 15

FIGURE 9

LOW VOLTAGE WIRING

MIS-1180

Manual 2100-353

Page 16

START UP AND OPERATION

THREE PHASE SCROLL COMPRESSOR START UP INFORMATION

Scroll compressors, like several other types of compressors, will only compress in one rotational direction. Direction of rotation is not an issue with single phase compressors since they will always start and run in the proper direction.

However, three phase compressors will rotate in either direction depending upon phasing of the power. Since there is a 50-50 chance of connecting power in such a way as to cause rotation in the reverse direction, verification of proper rotation must be made. Verification of proper rotation direction is made by observing that suction pressure drops and discharge pressure rises when the compressor is energized. Reverse rotation also results in an elevated sound level over that with correct rotation, as well as, substantially reduced current draw compared to tabulated values.

Verification of proper rotation must be made at the time the equipment is put into service. If improper rotation is corrected at this time there will be no negative impact on the durability of the compressor. However, reverse operation for over one hour may have a negative impact on the bearing due to oil pump out.

NOTE: If compressor is allowed to run in reverse rotation for several minutes the compressor’s internal protector will trip.

All three phase ZR*3 compressors are wired identically internally. As a result, once the correct phasing is determined for a specific system or installation, connecting properly phased power leads to the same Fusite terminals should maintain proper rotation direction.

The direction of rotation of the motor may be changed by reversing any two line connections to the unit.

SEQUENCE OF OPERATION

COOLING – Circuit R-Y makes at thermostat pulling in compressor contactor starting the compressor and outdoor motor. The G (indoor motor) circuit is automatically completed on any call for cooling operation, or can be energized by manual fan switch on subbase for constant air circulation.

HEATING – A circuit R-W1 is completed on each heating cycle energizing electric heat if so equipped.

START UP NOTES

For improved start up performance, wash the indoor coil with dishwasher detergent.

INDOOR BLOWER MOTOR

Some models feature a variable speed (ECM) motor providing high efficiency, low sound levels and soft start capabilities. The motor is self adjusting to provide the proper air flow rate at duct static pressures up to 0.50” WC without user adjustment or wiring changes.

On command from the wall thermostat the motor will start slowly and ramp up to full speed over a period of 1015 seconds.

When the thermostat is satisfied the blower will operate for approximately 1 minute, and then slow down and stop.

COMPRESSOR CONTROL MODULE

The compressor control is an anti-short cycle/lockout timer with high and low pressure switch monitoring and alarm output.

ADJUSTABLE DELAY-ON-MAKE AND BREAK TIMER

On a call for compressor operation the delay-on-make period begins which will be 10% of the delay-on-break setting. When the delay-on-make is complete and the high pressure switch (and low pressure switch if employed) is closed, the compressor contactor is energized. Upon shutdown the delay-on-break timer starts and prevents restart until the delay-on-break and delay-on-make periods have expired.

HIGH PRESSURE SWITCH AND LOCKOUT

SEQUENCE (Standard Feature)

If the high pressure switch opens, the compressor contactor will de-energize immediately. The lockout timer will go into a soft lockout and stay in soft lockout until the high pressure switch closes and the delay-on- make time has expired. If the high pressure switch opens again in this same operating cycle the unit will go into manual lockout condition and the alarm circuit will energize. Recycling the wall thermostat resets the manual lockout.

Manual 2100-353

Page 17

LOW PRESSURE SWITCH, BYPASS, AND LOCKOUT SEQUENCE

NOTE: The low pressure switch is an optional control and the bypass and lockout sequence are part of the standard compressor control module.

If the low pressure switch opens for more that 120 seconds, the compressor contactor will de-energize and go into a soft lockout. Regardless the state of the low pressure switch, the contactor will reenergize after the delay-on-make time delay has expired. If the low pressure switch remains open or opens again for longer than 120 seconds the unit will go into manual lockout condition and the alarm circuit will energize. Recycling the wall thermostat resets the manual lockout.

.

ALARM OUTPUT

Alarm terminal is output connection for applications where alarm signal is desired. This terminal is powered whenever compressor is locked out due to HPC or LPC sequences as described.

NOTE: Both high and low pressure switch controls are inherently automatic reset devices. The high pressure switch and low pressure switch cut out and cut in settings are fixed by specific air conditioner or heat pump unit model. The lockout features, both soft and manual, are a function of the Compressor Control Module.

ADJUSTMENTS

ADJUSTABLE DELAY-ON-MAKE AND DELAY-ON-BREAK TIMER

The potentiometer is used to select Delay-on-Break time from 30 seconds to 5 minutes. Delay-on-Make (DOM) timing on power-up and after power interruptions is equal to 2 minutes plus 10% of Delay-on-Break (DOB) setting:

0.5 minute	(30 seconds)	DOB = 123 second DOM
1.0 minute	(60 seconds)	DOB = 126 second DOM
2.0 minute (120 seconds)		DOB = 132 second DOM
3.0 minute (160 seconds)		DOB = 138 second DOM
4.0 minute (240 seconds)		DOB = 144 second DOM
5.0 minute (300 seconds)		DOB = 150 second DOM

Manual 2100-353

Page 18

SERVICE AND TROUBLESHOOTING

SERVICE HINTS

1.Caution homeowner to maintain clean air filters at all times. Also, not to needlessly close off supply and return air registers. This reduces air flow through the system which shortens equipment service life as well as increasing operating costs.

2.Check all power fuses or circuit breakers to be sure that they are the correct rating.

3.Periodic cleaning of the outdoor coil to permit full and unrestricted airflow circulation is essential.

PRESSURE SERVICE PORTS

High and low pressure service ports are installed on all units so that the system operating pressures can be observed. Pressure tables can be found later in this manual covering all models on cooling cycle. It is imperative to match the correct pressure table to the unit by model number.

REFRIGERANT CHARGE

The correct system R-22 charge is shown on the unit rating plate. Optimum unit performance will occur with a refrigerant charge resulting in a suction line temperature (6” from compressor) as shown in Table 11.

TABLE 11

SUCTION LINE TEMPERATURES

	Rated	95° OD	82° OD
Model	Airflow	Temperature	Temperature
P1124A2	800	56 - 58	63 - 65
P1224A1	800	56 - 58	63 - 65
P1130A2	1125	56 - 58	63 - 65
P1230A1	1000	56 - 58	63 - 65
P1136A2	1250	57 - 59	58 - 60
P1236A1	1100	57 - 59	58 - 60
P1142A3	1400	57 - 59	58 - 60
P1242A1	1400	57 - 59	58 - 60
P1148A2	1550	54 - 57	58 - 60
P1248A2	1550	53 - 55	56 - 58
P1060A1	1700	47 - 49	54 - 56

The above suction line temperatures are based upon 80°F dry bulb/67°F wet bulb (50% RH) temperature and rated airflow across the evaporator during cooling cycle.

FAN BLADE SETTINGS

Shown in Figure 10 are the correct fan blade setting dimensions for proper air delivery across the outdoor coil.

Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions below be checked and blade adjusted in or out on the motor shaft accordingly.

FIGURE 10

FAN BLADE SETTING

TABLE 12

FAN BLADE SETTING DIMENSIONS

Model	Dimension "A"
P1124A2	1.00"
P1224A1	1.00"
P1130A2	.75"
P1230A1	1.00"
P1136A2	1.00"
P1236A1	1.00"
P1142A3	1.75"
P1242A1	1.75"
P1148A2	1.75"
P1248A2	1.75"
P1060A1	1.75"

Manual 2100-353

Page 19

SUCTION AND DISCHARGE TUBE BRAZING

Compliant Scroll compressors have copper plated steel suction and discharge tubes. These tubes are far more rugged and less prone to leaks than copper tubes used on other compressors. Due to different thermal properties of steel and copper, brazing procedures may have to be changed from those commonly used.

•To disconnect: heat joint Areas 2 and 3 slowly and uniformly until braze material softens and the tube can be pulled out of suction fitting. (See Figure 10.)

•To connect:

–Recommended brazing materials: silfos with minimum 5% silver or silver braze material with flux.

–Reinsert tube into fitting.

–Heat tube uniformly in Area 1 moving slowly to Area 2. When joint reaches brazing temperature, apply brazing material. (See Figure 11)

–Heat joint uniformly around the circumference to flow braze material completely around the joint.

–Slowly move torch into Area 3 to draw braze material into joint. (See Figure 11.)

–Do not overheat joint.

FIGURE 11

BRAZING DIAGRAM

MIS-1179

TABLE 13

INDOOR BLOWER PERFOMANCE

ESP In	P1124A2				P1130A2				P1136A2				P1142A3				P1148A2		P1060A1
H2O	Dry /		Wet		Dry /		Wet		Dry /		Wet		Dry /		Wet		Dry / Wet		Dry / Wet
0.0	1025	/ 960			1350	/	1210		1465	/	1375		1650	/	1625		1950 / 1920		1850 / 1850
0.1	935	/ 870			1300	/	1160		1430	/	1340		1550	/	1525		1860 / 1830		1800 / 1780
0.2	865	/ 800			1240	/	1100		1385	/	1295		1435	/	1400		1780 / 1750		1725 / 1700
0.3	835	/ 770			1175	/	1035		1340	/	1250		1340	/	1310		1680 / 1660		1660 / 1625
0.4	800	/	735		1120	/	980		1275	/	1185		1230	/	1210		1580 / 1550		1580 / 1540
0.5	750	/	685		1050	/	910		1190	/	1100		1120	/	1100		1500 / 1480		1500 / 1475

Manual 2100-353

Page 20

TABLE 14

PRESSURE TABLE

COOLING					Air Temperature Entering Outdoor Coil Degrees F
		Return Air	Pressure	75	80	85	90	95	100	105	110	115
Model		Temperature
		75 deg. DB	Low Side	70	74	77	79	80	82	83	84	85
		62 deg. WB	High Side	219	220	224	234	248	258	276	293	316
P1124A2		80 deg. DB	Low Side	75	79	82	84	86	88	89	90	91
		67 deg. WB	High Side	224	225	230	240	254	265	283	300	324
		85 deg. DB	Low Side	81	85	88	90	92	94	96	97	98
		72 deg. WB	High Side	232	233	238	248	263	274	293	311	335
		75 deg. DB	Low Side	74	75	77	79	79	80	81	82	83
		62 deg. WB	High Side	188	203	217	233	249	265	282	299	317
P1224A1		80 deg. DB	Low Side	79	80	82	84	85	86	87	88	89
		67 deg. WB	High Side	193	208	223	239	255	272	289	307	325
		85 deg. DB	Low Side	82	83	85	87	88	89	90	91	92
		72 deg. WB	High Side	200	215	231	247	264	282	299	318	336
		75 deg. DB	Low Side	73	75	76	77	79	80	81	82	83
		62 deg. WB	High Side	200	219	234	254	271	288	307	327	342
P1130A2		80 deg. DB	Low Side	75	80	81	82	84	85	86	87	88
		67 deg. WB	High Side	205	225	240	260	278	295	315	335	351
		85 deg. DB	Low Side	84	86	87	88	90	91	92	94	95
		72 deg. WB	High Side	212	233	248	269	287	305	326	347	363
		75 deg. DB	Low Side	72	73	74	75	77	78	79	79	80
		62 deg. WB	High Side	199	213	227	243	258	275	293	310	330
P1230A1		80 deg. DB	Low Side	77	78	79	80	82	8/3	84	85	86
		67 deg. WB	High Side	204	218	233	249	265	282	300	318	338
		85 deg. DB	Low Side	80	81	82	83	85	86	87	88	89
		72 deg. WB	High Side	211	226	241	258	274	292	311	329	350
		75 deg. DB	Low Side	67	71	73	75	77	78	79	80	81
		62 deg. WB	High Side	195	215	229	249	263	282	302	317	336
P1136A2		80 deg. DB	Low Side	72	76	78	80	82	84	85	86	87
		67 deg. WB	High Side	200	220	235	255	270	290	310	325	345
		85 deg. DB	Low Side	77	82	84	86	88	90	91	92	94
		72 deg. WB	High Side	207	228	243	264	279	300	321	336	357
		75 deg. DB	Low Side	71	73	75	76	78	79	79	80	81
		62 deg. WB	High Side	209	225	242	258	275	293	310	329	346
P1236A1		80 deg. DB	Low Side	76	78	80	81	83	84	85	86	87
		67 deg. WB	High Side	214	231	248	265	282	300	318	337	355
		85 deg. DB	Low Side	79	81	83	84	86	87	88	89	90
		72 deg. WB	High Side	221	239	257	274	292	311	329	349	367

(Continued on Page 22 in Table 14A)

Manual 2100-353

Page 21

TABLE 14A

PRESSURE TABLE

COOLING

Air Temperature Entering Outdoor Coil Degrees F

		Return Air	Pressure	75	80	85	90	95	100	105	110	115
	Model	Temperature
		75 deg. DB	Low Side	70	72	75	77	78	79	80	81	82
		62 deg. WB	High Side	208	223	239	254	271	288	305	324	342
	P1142A3	80 deg. DB	Low Side	75	77	80	82	84	85	96	87	88
		67 deg. WB	High Side	213	229	245	261	278	295	313	332	351
		85 deg. DB	Low Side	81	83	86	88	0	91	92	94	95
		72 deg. WB	High Side	220	237	254	270	288	305	324	344	363
		75 deg. DB	Low Side	70	72	74	76	78	79	80	81	82
		62 deg. WB	High Side	192	206	220	236	252	268	286	304	323
	P1242A1	80 deg. DB	Low Side	75	77	79	81	83	85	86	87	88
		67 deg. WB	High Side	197	211	226	242	258	275	293	312	331
		85 deg. DB	Low Side	78	80	82	84	86	88	89	90	91
		72 deg. WB	High Side	204	218	234	250	267	285	303	323	343
		75 deg. DB	Low Side	73	74	75	76	78	79	80	81	82
		62 deg. WB	High Side	203	218	231	246	264	278	294	312	330
	P1148A2	80 deg. DB	Low Side	78	79	81	82	83	84	86	87	88
		67 deg. WB	High Side	208	222	237	252	268	285	302	320	338
		85 deg. DB	Low Side	83	85	87	88	87	91	92	93	94
		72 deg. WB	High Side	215	230	245	261	273	295	313	331	350
		75 deg. DB	Low Side	70	72	73	75	77	79	79	81	83
		62 deg. WB	High Side	200	215	230	247	263	281	298	317	336
	P1248A2	80 deg. DB	Low Side	75	77	78	80	82	84	85	87	89
		67 deg. WB	High Side	205	220	236	253	270	288	306	325	345
		85 deg. DB	Low Side	78	80	81	83	85	87	88	90	92
		72 deg. WB	High Side	212	228	244	262	279	298	317	336	357
		75 deg. DB	Low Side	65	66	68	69	70	72	74	75	76
		62 deg. WB	High Side	214	230	247	264	284	299	318	336	355
	P1060A1	80 deg. DB	Low Side	69	71	72	74	76	77	79	80	82
		67 deg. WB	High Side	219	236	253	271	289	307	326	345	364
		85 deg. DB	Low Side	74	76	78	79	81	83	85	86	88
		72 deg. WB	High Side	227	244	262	280	296	318	337	357	377

Manual 2100-353

Page 22

TROUBLESHOOTING ECM BLOWER MOTORS

CAUTION

Disconnect power from unit before removing or replacing connectors, or servicing motor. Wait at least 5 minutes after disconnection power before opening motor.

SYMPTOM

Motor rocks slightly when starting.

Motor won't start

No movement

Motor rocks, but wo'nt start

Motor oscillates up and down while being tested off of blower

Noisy blower of cabinet

"Hunts" or "puffs" at high CFM (speed)

Evidence of Moisture

Motor failure of malfunction has occured and moisture is present

Evidence of moisture present inside air mover

DO

Check out motor, controls, wiring and connections thoroughly before replacing motor

Orient connectors down so water ca'nt get in;

install "drip loops"

Use authorized motor and control model numbers for replacement

Keep static pressure to a minimum:

–Recommend high efficiency, low static filters

–Recommend keeping filters clean

–Design duct work for minimum static, maximum comfort

–Look for and recommend duct work improvement,where necessary, in replacement.

CAUSE / PROCEDURE

This is normal start-up for ICM

Check power at motor

Check low voltage (24 VAC R to C) at motor

Check low voltage connections (G, Y, W, R, C) at motor

Check for unseated pins in connectors on motor harness

Test with a temporary jumper between R - G

Check motor for tight shaft

Run Mositure Check

Check for loose or compliant motor mount

Make sure blower wheel is tight on shaft

It is normal for motor to oscillate with no load on shaft.

Check for loose blower housing, panels, etc.

High static creating high blower speed?

–Check for air whistling through seams in ducts, cabinets or panels.

–Check for cabinet / duct deformation

Does removing panel or filter reduce "puffing"?

–Reduce restiction

–Reduce maximum airflow

Replace motor and perform Moisture Check

Perform Moisture Check

DON'T

Automatically assume the motor is bad

Locate connectors above 7 and 4 o'closk postions

Replace one motor of control model number with another (unless an authorized replacement)

Use high pressure drop filters. Some have 1/2" H2O drop!

Use restricted returns

Manual 2100-353

Page 23

SYMPTOM

Motor starts but runs erratically

Varies up and down or intermittent

"Hunts" or puffs" at high CRM (speed)

CAUSE / PROCEDURE

Check line voltage for variation or "sag"

Check low voltage connections (G, Y, W, R, C) at motor; unseated pins in motor harness connectors

Check "Bk" for erratic CFM command (in variable speed applications

Check out system controls - thermostat?

Perform Moisture Check

Does removing panel or filter reduce "puffing"?

–Reduce restriction

–Reduce maximum airflow

Stays at low CFM despite sysstem call for cool or Check low voltage (thermostat) wires and connections heat CFM

Verify fan is not in dalay mode - wait until delay is complete

"R" missing / not connected at motor Perform motor / control replacement check

	Stays at high CFM		"R" missing / not connected at motor
		Is fan in dalay mode? - wait until delay time complete
	Blower wo'nt shut off	Current leakage from controls into G, Y or W?
			–	Check for Triac switched thermostat or solid state
				relay
SYMPTON		CAUSE / PROCEDURE
Excessive noise			Determine if it is air noise, cabinet, duct or motor noise .
			Interview customer if necessry.
	Air Noise		High static creating high blower speed?
			–	Is airflow set properly?
			–	Does removing filter cause blower to slow down?
				Check / replace filter
			–	Use low pressure drop filter
			–	Check / correct duct restirctions

DO

Size the equpment wisely

Check orientation before inserting motor connectors

DON'T

Oversize system then compensate with low airflow

Plug in power connector backwards

Force plugs

MOISTURE CHECK PROCEDURE			COMFORT CHECK PROCEDURE
	Connectors are oriented "down"			Check proper airflow settings
	Arrange harnesses with "drip loop" under motor			Low static pressure for lowest noise
	Condenste drain plugged?			Set low continuous fan CFM
Check for low airflow (too much latent capacity)				Use humidistat and 2-speed cooling units
	Check for undercharged condition			Use zoning controls designed for ICM that regulate CFM
Check and plug leaks in reutrn ducts and cabinet				Thermostat in bad location?
Manual		2100-353
Page		24